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Hemostatic Pad Assembly Kit and Method

a technology of hemostasis and kit, which is applied in the field of hemostatic pads, can solve the problems of hydrolytic reaction and substantial bleeding

Active Publication Date: 2015-01-15
ETHICON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a hemostatic wound treatment device that includes a bioabsorbable scaffold with a wound facing surface and an opposing surface. The scaffold is wetted with a biocompatible liquid and a hemostatic powder adheres to at least the wound facing surface of the scaffold. The scaffold can be made from materials such as oxidized polysaccharide, bioabsorbable synthetic polymer, or combinations thereof. The device can be used in a method of making the wound treatment pad by wetting the scaffold with the biocompatible liquid, contacting it with the hemostatic powder, and applying it to the wound. The device can also be a prep kit that includes the powdered hemostatic material, the bioabsorbable scaffold, and the biocompatible liquid. The invention provides a convenient and effective way to treat wounds by promoting blood clotting and tissue regeneration.

Problems solved by technology

In other circumstances substantial bleeding can occur.
The nonaqueous adhesive does not allow a hydrolytic reaction to occur between the fibrinogen and thrombin until the bandage is moistened by a body fluid, such as blood and teaches that the bandage can be prepared and stored for prolonged periods while retaining hemostatic activity.

Method used

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  • Hemostatic Pad Assembly Kit and Method
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  • Hemostatic Pad Assembly Kit and Method

Examples

Experimental program
Comparison scheme
Effect test

example 1

Hemostatic Test of Inventive Hemostatic Pad Preparation and Use

[0068]A scaffold made of composite matrix of a knitted oxidized regenerated cellulose (ORC) backing layer under a layer of Polyglactin 910 (PG910) non-woven fibers as described above was utilized. A dry hemostatic powder (lyophilized) derived from animal origin (porcine) was utilized. Approximately three hundred ninety (390) mg of thrombin powder (having about 20 IU / mg active thrombin) and about seventeen hundred (1700) mg of fibrinogen powder (containing about 0.4 mg / mg clottable fibrinogen) were available. The hemostatic powders were disaggregated from aggregated cake that formed during storage. The thrombin and fibrinogen powders were then transferred into a powder tray and thoroughly mixed and evenly distributed in the tray. The scaffold in this test was cut to size to cover end of kidney with approximately a one (1) cm margin, size of the scaffold was 3.5 cm×2.5 cm rectangular pieces.

[0069]A surgical practitioner pe...

example 2

Demonstration of Scaffold Wetting and Adherence

[0073]Exemplary scaffold materials that were used are as follows:[0074]Specimen SF: lightweight, layered ORC based absorbable hemostatic material;[0075]Specimen SS—structured non-woven fabric, needle punched with interlocking fibers, ORC based absorbable hemostatic material;[0076]Specimen SO—loose knit ORC based absorbable hemostatic material;[0077]Specimen CM or composite matrix, whereby the scaffold was made of composite multi-layer matrix of a knitted oxidized regenerated cellulose (ORC) reinforcing backing layer under a layer of Polyglactin 910 (PG910) non-woven fibers as a hemostatic powders carrier layer. Lyophilized biologic materials that were used as the hemostatic powders tested were: Bioseal Fibrinogen (˜850 mg per 5-ml vial); Bioseal Thrombin; (˜78 mg per 5 ml vial).

[0078]Soaking Method. One vial each of fibrinogen and thrombin was milled into powder in the respective vials, followed by combining both hemostatic powders and ...

example 3

Tissue Adhesion Evaluation

[0081]The composite matrix (Specimen CM) and Specimen SS, as described above, were further tested for tissue adhesion. The selected scaffolds were pre-cut into three quarter (¾) by four (4) inch strips and then coated with the blended, disagglomerated hemostatic powders directly before placing the sample strips onto the bovine corium to test for adhesion strength by evaluation of three different groups (number of tests in each group N=4) of hemostatic powder mixtures that each contain a different combination of hemostatic powders and scaffolds. The hemostatic powder dosages were prepared at the testing site and include the following: Specimen SS (Non-woven ORC) coated with blended disagglomerated hemostatic powders containing Fibrinogen: total of 130 mg or 6.7 mg / cm2; Thrombin: total of 1450 IU or 75 IU / cm2; Calcium Chloride total of 18 mg or 0.93 mg / cm2. Specimen CM (Composite Matrix) coated with blended disagglomerated hemostatic powders containing Fibrin...

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Abstract

The present invention relates generally to agents and devices for promoting hemostasis and tissue sealing and, more particularly, to hemostatic pads comprising bioabsorbable scaffolds that can deliver lyophilized hemostasis promoting proteins, such as fibrinogen and thrombin, to a wound site or injured organ or tissue.

Description

THE FIELD OF THE INVENTION[0001]The present invention relates generally to agents and devices for promoting hemostasis and tissue sealing and, more particularly, to hemostatic pads comprising bioabsorbable scaffolds that can deliver lyophilized hemostasis promoting proteins, such as fibrinogen and thrombin, to a wound or injured organ or tissue.BACKGROUND[0002]Blood is a liquid tissue that includes red cells, white cells, corpuscles, and platelets dispersed in a liquid phase. The liquid phase is plasma, which includes acids, lipids, dissolved electrolytes, and proteins. One particular protein suspended in the liquid phase is fibrinogen. When bleeding occurs, the fibrinogen reacts with water and thrombin (an enzyme) to form fibrin, which is insoluble in blood and polymerizes to form clots.[0003]In a wide variety of circumstances, animals, including humans, can suffer from bleeding due to wounds or during surgical procedures. In some circumstances, the bleeding is relatively minor, an...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61L15/64A61L15/28A61L15/26A61L15/44
CPCA61L15/44A61L2300/252A61L2300/418A61L15/64A61L2300/254A61L15/26A61L15/28A61L2400/04C08L67/04
Inventor HUBBELL, RANDOLPH W.ECKHARDT, JAMESRIEBMAN, JEROMELI, YUFUELSER, MICHAEL
Owner ETHICON INC
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